[tex]4\frac{1}{5} : 1,4 + 2\frac{2}{3} * 3\frac{3}{4} = \frac{21}{5} : \frac{14}{10} + \frac{8}{3} * \frac{15}{4} = \frac{21}{5} * \frac{10}{14} + \frac{8}{3} * \frac{15}{4} = \frac{42}{14} + \frac{30}{3} = \frac{126}{42} + \frac{420}{42} = \\\\\frac{546}{42} = 13[/tex]
-EnglishElite
